No, you do not! Simply report to the ticket booth and say you're attending the Drent-Wolf wedding. You will be allowed in as early as 4pm. Zoo buildings will remain open until 5pm, giving you a free hour to explore the aquarium, Desert Dome, etc.
No, parking at the zoo is free (this isn't California).
Yes! Our guests will have 2 hours to explore the jungle immediately after the ceremony.
It's possible... but it's Purdue, so does it really matter?